(function( dropdown, $, undefined ) {

	var DDSPEED = 10;
	var DDTIMER = 15;
	// main function to handle the mouse events //
	
	dropdown.reset = function(id){
		var h = document.getElementById(id + '-ddheader');
		//eval("if("+id+"_header != undefined){h.innerHTML = "+id+"_header;};");
		
	}
	
	dropdown.ddMenu = function(id,d){ 
	  var h = document.getElementById(id + '-ddheader');
	 // eval("if("+id+"_header == undefined){"+id+"_header = "+h.innerHTML+";alert("+id+"_header);};");
	  
	  var c = document.getElementById(id + '-ddcontent');
	  clearInterval(c.timer);
	  if(d == 1){
		clearTimeout(h.timer);
		if(c.maxh && c.maxh <= c.offsetHeight){return}
		else if(!c.maxh){
		  c.style.display = 'block';
		  c.style.height = 'auto';
		  c.maxh = c.offsetHeight;
		  c.style.height = '0px';
		}
		c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
	  }else{
		h.timer = setTimeout(function(){ddCollapse(c)},50);
	  }
	}

	// collapse the menu //
	function ddCollapse(c){
	  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
	}

	// cancel the collapse if a user rolls over the dropdown //
	dropdown.cancelHide = function(id){
	  var h = document.getElementById(id + '-ddheader');
	  var c = document.getElementById(id + '-ddcontent');
	  clearTimeout(h.timer);
	  clearInterval(c.timer);
	  if(c.offsetHeight < c.maxh){
		c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
	  }
	}

	// incrementally expand/contract the dropdown and change the opacity //
	function ddSlide(c,d){
	  var currh = c.offsetHeight;
	  var dist;
	  if(d == 1){
		dist = (Math.round((c.maxh - currh) / DDSPEED));
	  }else{
		dist = (Math.round(currh / DDSPEED));
	  }
	  if(dist <= 1 && d == 1){
		dist = 1;
	  }
	  c.style.height = currh + (dist * d) + 'px';
	  c.style.opacity = currh / c.maxh;
	  c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
	  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
		clearInterval(c.timer);
	  }
	}
	
}( window.dropdown = window.dropdown || {}, jQuery ));